<style>
    .upload_file {border:1px solid #eee; position: absolute;left: 0;width: 100%;height: 100%;top: 0;opacity: 0;z-index: 2;cursor: pointer;}
    .show_img{border:1px solid #eee;width:100%;height: 100%;}
    .fa-trash-o{position: absolute;right: 5px;top: 5px;color: red;width: 15px;height: 15px;z-index: 3}
</style>